111102111202171 has 2 divisors, whose sum is σ = 111102111202172. Its totient is φ = 111102111202170.

The previous prime is 111102111202081. The next prime is 111102111202279. The reversal of 111102111202171 is 171202111201111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111102111202171 - 2³⁵ = 111067751463803 is a prime.

It is a super-2 number, since 2×111102111202171² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111102111206171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551055601085 + 55551055601086.

It is an arithmetic number, because the mean of its divisors is an integer number (55551055601086).

Almost surely, 2^{111102111202171} is an apocalyptic number.

111102111202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102111202171 is an equidigital number, since it uses as much as digits as its factorization.

111102111202171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 22.

Adding to 111102111202171 its reverse (171202111201111), we get a palindrome (282304222403282).

The spelling of 111102111202171 in words is "one hundred eleven trillion, one hundred two billion, one hundred eleven million, two hundred two thousand, one hundred seventy-one".